Table 2 Clinical outcomes

Elderly group

4.9 (2.67)

2.0 (1.70)

0.002*

4.5 (3.37)

1.9 (2.07)

0.013*

Young group

3.1 (2.68)

2.0 (2.12)

0.020*

2.7 (2.70)

1.0 (1.75)

0.004*

Mean pre-op NDI (SD)

Final follow-up (SD)

P value

Mean pre-op JOA (SD)

Final follow-up (SD)

P value

Elderly group

19.2 (12.44)

8.6 (6.50)

0.012*

10.0 (4.45)

13.14 (2.79)

0.009*

Young group

9.9 (7.90)

6.0 (4.34)

0.014*

13.3 (1.67)

16.0 (1.19)

<0.001*